Transmission tower



July 29, 1952 J ANDREWS 2,605,417

TRANSMISSION TOWER Filed May 27, 1950 ll lllllllllllllllllllll JOHNNIE ANDREWS INVENTOR ATTORNEY Patented July 29, 1952 "UNITED STATES AT E'NTOFFICE l i S 2,605 ,417 w a i Q I c 'i RANSll/ IIS-SION TOWER I Johnnie Andrews, Fort Worth; Tex. sanitation May 1950, Seriial'No. 164,7173

reflector on the next tower of the system. When installing the reflectors it has been found that the referred to alignment is difiicult to effect, and thatordinary clamping and'securing operations cause misalignment afterthe' reflectors have been tuned. 'Itis an object of the invention to provide a reflector orientating means whereby opposing reflectors ,oncseparate towers may 'b,e"accurately aligned orj tuned with each other, and which meanswill maintain the reflectors in alignment while the same are being clamped "andse'cnred inpl'a' i f sinc towers of the described classjaretall "and narrow they'are' subjected totorque'by'the' wind, and any such torque will cause mi alignment of the timed reflectors; It is a furtherobject of the invention to provide a towerconstruction which will resist torque caused by the ind; 'The inventionwill be more readily understood by reference to the accompanying. drawings and the following description. i Figure 1 is a brokenvertical'sectionalandlele vationof the upper end ora'tower embody ng'fa 7 preferred form of the invention. i v a Figure 2 is a broken perspectiveyiew ,of a part of the reflectororientating mechanism illustrated in Figure l. I a .t Figure?) is a perspective View of the upperend of the tower and having one'ofthe reflectorslremovedsoj as to illustrate moreclearly the guying beam employed to resist torque at the top of vthe tower. f f In the drawings, the numeral lll fgjenerally designates a tower comprised of vertical'c'o'rners 4'Claims; "(01. 250-33665) spaced from the upper surface of the plate [4.

- The inner ends of opposingly arranged cranks 2-2 engage opposite sides of the adjusting arm 2 l. Each crank 22 is supported by a bearing plate'23 and a threaded bracket 24, both of which project upwardly from the surface of the plate l4 and outwardly of the flange ll. A'lock nut 25 .on each crank 22 is arranged to engage the surface of itsadjacentbracket 24 for locking the end of the crank'in position against one side of the adjusting arm 2|.

' On the upperendof the tower Hi there is another'supporting plate 26 rotatably receiving the upwardly projecting end of the shaft 16 therethrough. Another tubular shaft 21 is rotat ably" mounted around and in turning contact with the first described shaft 16, and is also provided with 'acfiange 28 aroundits lower end for supporting the last described shaft 21 on the upper surface of the upper supporting plate 26'. Arcuate slots 25? are formed in the flange 28 in the same manner as the previously described slots I8 in the first describedfiange [1. Locking bolts [l3 and nuts .20 are positioned through the upper supporting plate 26 and the tubular shaft 21 in its desired oriented position.

Anjadjusting arm 2| corresponding with the one already described, projects from the side of the outer shaft 2! and is positioned between the op'posing'ends of thread cranks 22. As before, thec'ranks 221are supported by bearing plates, 23 and threaded brackets! which, in this part of thestructure, project upwardly from theupper plate 26; V I

'The upper end of the first shaft I6 extends above the upper end of the second shaft 21 where it is provided with a tubular extension 30. The extension 30,,is of the same diameter as the second shaft 21, and may be welded or otherwise secured to the first shaft l6 as indicated at 3 I.

'Ifhe'sha'fts l6 and 21, together with theextens'ionYSll, support a pair of parabolic reflectors 32 in generally back to back relation and with their axes in generally horizontal positions. Antennas 33 are-mounted in the focal points of the respectivere'flectors 32. ]Each reflector '32 is sup- H, horizontal cross members l2, and diagonal of=the tower; lifl thereis-ajhorizont'al supporting plate M having an opening l 5 rotatab1y securrface of the "supported. in a flanged ring .34 having upper" and lower fhorizontal bracketsw35" and 38' formed to engage one-half of the diameter of the extension 30 r, one-half the diameter of theouter shaft 21, respectively, Corresponding clamps 31" and 38, respectivelylare positioned around the extension '38 andouter shaft 21,, andboth are secured by tboltsss totheibrackets 35 and 36. Binding posts {Q9 inth e centersandprojecting from the rear surfaces ofethe reflectors 32, are connected witha transmitter and a receiver, not shown, by means of wiresf4l.1

The upper end of the tower I0 is secured against torque by means of a transverse guy beam v llthe I V endsof' which extendoutwardlyandare secured' 2| projecting from the side'of the shaft I6 and to guys 43 anchored in the earths surface at suband are secured to vertical end pieces 46 welded therebetween. Angular brackets 41 are welded to the end pieces 46, and the referred to guys 43 are The invention is not limited to the embodiment herein shown and described, but may be made in many ways within the scope of the ;appended claims. I

What is claimed is:

-1. Means for tuning and securing a pair of reflectors on a radio tower, a vertical tubular shaft rotatably supported on said tower, a second shaft rotatably mounted in and extending through connected with said brackets. The horizontal manner described and as illustrated in Figure 1.

The clamping bolts 39 of one upper clamp 31 are loosened, and the corresponding bolts of the lower clamp 38 supporting the same reflector 32 are tightened. The bolts 3,9,through the remaining upper and lower clamps 31 and 36 are respectively tightened and loosened in the "reverse manner from that described with respect to the first referred to arrangement. a The lower locking bolt i9 and nuts 20 in the lowersu'pporting plate 14 and extending through the slots 18 of the lower flange I! are loosened and the lower cranks 22 are operated to move the lower adjusting arm 2! and to thereby orient the extension 30 and the reflector 32 tightly secured thereto. When the affected reflector is accurately tuned with a reflector of another tower, the locknuts 'on the lower cranks 22 are'secured against their respective threaded brackets 24. I

' The uppercran'ks 22 are'then operatedfin the same manner as the foregoing, and act upon the upper adjusting arm 2! to rotate the outershaft 21 and orient the reflector 32 secured thereon. The upper lock nuts 25 are then positioned against adjacent brackets 24, and after which all clamp nuts 39, both upper and lower, are tightened.

It is possible to tune both reflectors 3 2 with only one adjusting arm 2|, but such adjustment requires more skill and time than the preceding description of operation. For example, the lower cranks 22 and lower adjusting arm 21 may be eliminated and both of the upper clamps 31 loosened about the" extension which is secured against rotation, as by means" of the lower locking'bolt l9 and nut 20. Both ofthe lower clamps and above the first said shaft, a clamp connected with the upper end of each said reflector and adapted to be secured on the upper end of the second said shaft, other clamps connected with the lower end of each said reflector and adapted to be secured on the first said shaft, screw means rot'ating'one of said shafts, and means adapted to secure the remaining said shaft against rotation.

2. Means for tuning and securing a pair of reflectors on a radio tower, a vertical tubular shaft rotatably supported on said tower, a second shaft rotatably mounted in and extending through and above the first said shaft, a clamp connected with the upper end of each said reflector and adapted t'o'be secured on the upper end of the second said shaft, other clamps connected with the lower ends of each said reflector and adapted to be secured on the first said shaft, and means rotating each of said shafts independently of each other.

3. Means for tuning and securing a pair of reflectors on a radio tower, a vertical tubular shaft rotatably supported on said tower, a second shaft rotatably mounted in and extending through and above the first said shaft, aclamp connected with the upperend of each said reflector and adapted to be secured on the upper end of the second said shaft, other clamps connected with the lower end of each said reflector and adapted to be secured on the first said shaft, arms projecting from each said'shaft, and 'screw'means adapted to engage and 'rotatesaid arms independently of each other.

4. "In combination with a radio transmission tower, a plate horizontally secured across the upper endof said tower, and another plate secured within and beneath the first said plate, a tubular shaft having a flange aroundthe lower end thereof, said flange rotatably contacting the upper surface of the first said plate, a second shaft rotatably received within the first said shaft and extending through and above the latter and through and above'the first said plate, a flange on they second said. shaft rotatably contacting the upper surface of the lower said plate, a pair of reflectors having clamps on the lower and upper 38 are tightened around thelouter shaft 21 and the latter is oriented 'until'one of the reflectors 32 is tuned with a reflector of another tower. The

ca p 31 at the upper end of the timed reflector is'then'tightened and its lower clamp 38 'of the same reflectoris'loosened. By again operating the upper 'cranks 'Z-Tandadjusting arm 2|,the remaining'reflector may be'tun'ed, and fter which all clamp bolts 39 are-tightened.

The upper cranks22rnaybe eliminatedfand' the lower' cranks 22 employed instead. 'In this in stance the upper clampse'l'ofiboth reflectors 32 are tightened and the "lower clamps 3s lo'oserie d. The operation is then carried out by tuning first one reflector and then the otherloosen'i'ng and tightening the up er and lbyv'e'rciam'ps ST- and ,aa

ends thereof, said, upper clamps being detachably "secured; to said upwardly. extending end of the second said shaft, 'said lower clamps being detachably secured to said first said shaft, and means rotating and securing said shafts independently of each other.

I JOHNNIE ANDREWS.

. B FEB SRCI The following references are of record in the file. of thispatent; 5 1

" T D. STAT AT NT .Me e n .19 6. n A vea Oct. 23,1928 1,842 224 Ja -19,1932 2,264 850 lea-2.19

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